{"id":"CVE-2026-80888","state":"PUBLISHED","title":"drm/vmwgfx: drop dma_buf reference on foreign-fd prime import","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: drop dma_buf reference on foreign-fd prime import\n\nttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's\ndma_buf->ops do not match the ttm_object_device's ops, but does so\nwithout releasing the reference acquired by dma_buf_get().  Any\nunprivileged renderD client passing a non-vmwgfx prime fd through the\nDRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per\ncall and indefinitely pins the foreign exporter's GEM resources.\n\nFunnel the error path through the existing dma_buf_put() so the\nreference is always dropped.","publishedAt":"2026-09-04T17:11:04.975Z","updatedAt":"2026-09-14T11:58:52.563Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"1715901e7052cf90fbf04c8303e563a47e021278","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"619c3cfa88e09603a13d918f754808db2dda7057","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"c1c22fca0a0896a452a7cb92422d67babd65b4be","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"a1e972fa94c3a8069e022c67b9d97c7aa7b05293","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"a8434b145b1e467940334c58c00af241e9494c5f","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"4df39eb99bb47d1f24d1952c23b21b10988356bf","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"f739416dc555fa205a785e5135d73fa39b26f35d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/ttm_object.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.13","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/ttm_object.c"]}],"references":["https://git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278","https://git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee","https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057","https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be","https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293","https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f","https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf","https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80888.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80888","state":"PUBLISHED","datePublished":"2026-09-04T17:11:04.975Z","dateUpdated":"2026-09-14T11:58:52.563Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.799Z"},"containers":{"cna":{"title":"drm/vmwgfx: drop dma_buf reference on foreign-fd prime import","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/vmwgfx: drop dma_buf reference on foreign-fd prime import\n\nttm_prime_fd_to_handle() returns -ENOSYS when the imported fd's\ndma_buf->ops do not match the ttm_object_device's ops, but does so\nwithout releasing the reference acquired by dma_buf_get().  Any\nunprivileged renderD client passing a non-vmwgfx prime fd through the\nDRM_VMW_GB_SURFACE_REF{,_EXT} path leaks one dma_buf reference per\ncall and indefinitely pins the foreign exporter's GEM resources.\n\nFunnel the error path through the existing dma_buf_put() so the\nreference is always dropped."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"1715901e7052cf90fbf04c8303e563a47e021278","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"619c3cfa88e09603a13d918f754808db2dda7057","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"c1c22fca0a0896a452a7cb92422d67babd65b4be","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"a1e972fa94c3a8069e022c67b9d97c7aa7b05293","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"a8434b145b1e467940334c58c00af241e9494c5f","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"4df39eb99bb47d1f24d1952c23b21b10988356bf","versionType":"git"},{"version":"65981f7681abdf92b25942222b629b9c512d0705","status":"affected","lessThan":"f739416dc555fa205a785e5135d73fa39b26f35d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/ttm_object.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.13","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/gpu/drm/vmwgfx/ttm_object.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1715901e7052cf90fbf04c8303e563a47e021278"},{"url":"https://git.kernel.org/stable/c/c4fd91ee7228f56fbb4cf528757dc17ffefeb0ee"},{"url":"https://git.kernel.org/stable/c/619c3cfa88e09603a13d918f754808db2dda7057"},{"url":"https://git.kernel.org/stable/c/c1c22fca0a0896a452a7cb92422d67babd65b4be"},{"url":"https://git.kernel.org/stable/c/a1e972fa94c3a8069e022c67b9d97c7aa7b05293"},{"url":"https://git.kernel.org/stable/c/a8434b145b1e467940334c58c00af241e9494c5f"},{"url":"https://git.kernel.org/stable/c/4df39eb99bb47d1f24d1952c23b21b10988356bf"},{"url":"https://git.kernel.org/stable/c/f739416dc555fa205a785e5135d73fa39b26f35d"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-09-14T11:58:52.563Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.13","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}